A few months ago, Ty Burrell ('Modern Family') was added to the cast of 'The Muppets' sequel as a villainous Interpol agent. This followup to the hit 2011 film would be absent Jason Segel, who starred in and co-wrote 'The Muppets,' but writer Nick Stoller and director James Bobin would both be returning. Ty Burrell was actually brought on to replace, of all people, Christoph Waltz ('Django Unchai…